In desperation in similar situations, I have resorted to using nonsense switch characters, in the hope that the nice developer Johnnie would prompt me with the valid set, like MSIExec does. Try 'Setup /_thisisridiculous' - the leading underscore attempts to avoid the stub taking the first character as the argument, which by chance could be valid.

The WAIK install is actually a MSI but when you try to use normal silent install commands, you are prompted with a dialog box stating that you must runb the install in full UI.

I presume you've tried the usual 'fix', of setting the property ISSETUPDRIVEN to 1?

I just tried that with the following command but with same results. Any other suggestions?

msiexec.exe /i /qb WAIK_x86.msi ISSETUPDRIVEN=1

There is only a limited number of ways this could be happening. Either a LaunchCondition is set or a Custom Action is being called to set a property. You just need to find it.

Edit
Found it for you. Create a transform and in it, take out the LaunchCondition "UILevel = 5","[String_MustHaveFullUI]"

MAKE SURE YOU FULLY TEST THE DEPLOYED APP! There has to be a reason they want full UI, I just haven';t had time to find out what yet. From a cursory glance it looks like it might simply be that they want to force the display of the EULA...

Worked!!! Thanks